Simulation of neutron irradiation damage in tungsten using higher energy protons. (December 2016)

• Record Type: Journal Article
• Authors: Rayaprolu, R.; Möller, S.; Linsmeier, Ch.; Spellerberg, S.
• Is Part Of: Nuclear materials and energy. Volume 9(2016)
• Page Start: 29
• Page End: 35
• Publication Date: 2016-12
• Subjects: Irradiation damage -- Neutron damage -- Fusion -- Tungsten -- Proton irradiation -- Plasma-facing materials; Nuclear energy -- Periodicals; Nuclear fuels -- Periodicals; Nuclear reactors -- Materials -- Periodicals; Radioactive substances -- Periodicals; 621.4833
• DOI: 10.1016/j.nme.2016.09.008
• Languages: English
• ISSNs: 2352-1791

Abstract

Highlights: Proton nuclear reactions added to displacement damage estimates for tungsten. Similar Re/Os transmutation as estimated for DEMO neutrons with 30 MeV Protons. Homogenous sample investigation thickness is 500 µm, similar to fission studies. Proton accelerators can be utilized as complementary experimental irradiation setups. Abstract: This study combines both transmutational changes and accelerated damage by simulation of irradiating tungsten with 16, 30 and 45 MeV protons. Comparative results indicate 30 MeV to be most optimal amongst the three, for uniformity of combined damage. Finally, the results were compared against fission reactor calculations and DEMO relevant compositional changes. Using 30 MeV protons, for damages of 1 dpa equivalent, the rhenium content is calculated as 401 appm. This compares well against appm induced within a DEMO reactor and is better than estimated 50, 000 appm for a fission reactor. Using higher energy protons, the recoils are expected to behave similar to neutron displacement damage creation. Additionally, the study suggests near constant and comparable damage for sample thickness's upto 500 µm.